open-hearth furnace open-hearthed • open-hearth process · · · Info · Definitions · Characters · · open-hearth furnace · · Text Common · · Latin · · Scripts 19 · · Length 5 · · Syllables Definitions · · · (noun) a furnace for making steel in which the steel is placed on a shallow hearth and flames of burning gas and hot air play over it. Synonyms: open-hearth furnace. · · Noun Definition 1 Characters · · space U+0020 - hyphen-minus U+002D a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 h latin small letter h U+0068 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075